RU2253707C1 - Apparatus for stapling of flax filament in strip - Google Patents

Abstract

FIELD: textile industry.

SUBSTANCE: apparatus has feeding rolls for feeding filament into working chamber formed as housing with aperture in its side surface for discharge of stapled filament, and scutching drums mounted inside housing for synchronous rotation on shafts in single direction. Scutching drums are provided with radial beating planks arranged on scutching drums alternatively in two planes extending perpendicular to axes of rotation. Section of each beater maximally distal from axis of rotation is turned with respect to other section adjoining to site where said beater is embedded, with planes of said sections extending in parallel with one another. Section maximally remote from axis of rotation is turned in clockwise direction when viewed from axis of rotation of scutching drum.

EFFECT: increased efficiency and provision for producing of filaments with equalized length.

4 dwg

Description

The invention relates to the textile industry, and in particular to devices for producing stapled linen fiber in a ribbon and can be used in the production of yarn from a mixture of linen with wool or cotton, or with chemical fibers, as well as non-woven materials.

At present, devices for stapling chemical fibers are mainly used for mechanically cracking flax fiber into complexes of elementary fibers.

Known devices for stapling fibers by cutting a tow (SU 1602885 A1, 30.10.90 and SU 1305204 A1, 04.23.87).

The use of known devices for stapling flax fiber by cutting does not allow to preserve the integrity of the form of elementary flax fibers, which leads to an unjustified increase in the share of short short fibers at the stage of spinning. In addition, the complexes of elementary fibers after cutting have blunt ends, which reduces the spinning value of the fibers thus obtained. As a result of cutting the fiber, proper effects are not obtained, as a result of which there is a dry bonfire in the formed fiber and non-cellulose impurities on its surface.

A device is known for stapling fibers by longitudinally breaking them in a bundle while maintaining flow continuity (JP 58-42289 A, 09/19/83).

However, the use of devices based on the gap does not allow to obtain fibrous complexes of a given length. In addition, due to the small distances between the pairs of exhaust rollers and their small diameters, reliable clamping of the fibrous tape is not provided, which leads to pulling out of the inter-roll zone of the fibers. The disadvantage of this device is also the low efficiency of removing from the surface of the fibers of non-cellulosic impurities and a dry bonfire.

The closest analogue (prototype) of the claimed technical solution is a known device for stapling flax fiber in a tape, containing feed rollers for feeding fiber into the working chamber in the form of a casing with an opening on the side surface for the output of the stapled fiber and rotating inside the casing rotating on the shafts synchronously in one direction by scuffing drums with radial beating strips, which are alternately mounted on the drums in two parallel planes perpendicular to the axes of rotation drumming (RF Patent No. 21644564 by application No. 200112730 dated 05.22.2000, RU 2142525 C1, 12/10/1999).

However, this device does not allow to obtain at the exit from it a fairly uniform length composition of the fibers. This is due to the fact that the fibers in the tape interacting with the working edge of the beater are at different distances from the axis of rotation of the beater drums. This circumstance leads to the fact that the efforts of the tension of the fibers, more remote from the axis of rotation, more than in fibers located at a shorter distance from the axis. This is because the relative speeds of the fibers along the tape depend on the distances mentioned. The greater the distance from the center, the faster the fibers move along the edge. Therefore, fibers located at different distances from the axis of rotation move according to different laws, which leads to an inequality in the tension forces of the fibers at the end of the lapping process, and ultimately to different lengths of fibrous complexes that separate from the tape.

The objective of the invention is to provide a device for stapling flax fiber in a tape, ensuring the achievement of a technical result, which consists in obtaining staple fibers having a smaller variation in length.

This technical result is achieved by the fact that the device for stapling flax fiber in the tape, containing feed rollers for feeding fiber into the working chamber in the form of a casing with an opening on the side surface for the output of the staple fiber and inside the casing rotary drum shafts rotating on the shafts synchronously in one direction with radial beating strips, which are mounted on drums alternately in two parallel planes perpendicular to the axes of rotation, according to the invention, each beat on more remote from the axis of rotation of the drum section is rotated relative to the other section being in sealing zone beat, these sections being plane parallel and turn the outermost section carried in a clockwise direction when viewed from the drum rotation axis.

The use of beats, in which the section farthest from the axis of rotation of the drum is rotated relative to another section located in the bead embedment area (provided that the planes of these sections are parallel, and the farthest section is rotated clockwise when viewed from the axis of rotation of the drum ) will contribute to the next positive technological effect. When such a “rotated” beat hits the tape during the sweeping process, the fibers closest to the axis of rotation of the beat drums will be able to cover the edge of the beat to a greater extent than the fibers farthest from the center of rotation of the drums. This will lead to an increase in the sweep time and the angle of coverage of the edge of the beat with the tape, and therefore to an increase in the tensile forces in the fibers located close to the axis of rotation. At the same time, in the fibers farthest from the axis of rotation of the beater drums, the tensile forces will decrease due to a decrease in the angle of coverage of the edge of the beat with the tape and, as a result, the overwhelming time. Thus, the values of the tensile forces in the fibers located at different distances from the axis of rotation of the beater drums are aligned. As a result, this will lead to the equality of the conditions of force loading of the fibers along the width of the beat and to the alignment of the fibers along their length.

In addition, the presence of the newly proposed “rotated” beats will lead to a more intensive removal of the air-fiber mixture from the processing zone, since these beats will work like fan blades. This ultimately will enhance the effects achieved by the decision set forth in the patent of the Russian Federation No. 2206640, according to the application No. 2002111467 from 04.29.2002 due to a more intensive introduction of air into the zone of dispersion.

The invention is illustrated by drawings.

Figure 1 shows a vertical section of the proposed device.

Figure 2 shows a horizontal section of the proposed device.

Figure 3 shows a diagram of the interaction of the beating straps with fiber.

Figure 4 shows the shape of the beat.

A device for stapling flax fiber in a ribbon (Figs. 1 and 2) consists of feed rolls 1 and 2 and two drums 3, 4 installed inside the casing 7 (Fig. 3) of the working chamber on parallel shafts 8. The shafts are connected by gears 9 included in engagement with the drive gear 10, which provide a consistent rotation of the drums in the same directions. On the drums in the radial direction are alternately located in two planes A and B beater straps 11 (figure 2). In the end surface 7 "a" of the casing above the zone of intersection of the trajectories of the ends of the beater strips there is a cutout 12 for feeding the tape 14. On the side surface 7 "b" of the casing there are outlets 13 for the air-fibrous mixture.

The device operates as follows. Prepared in the form of a tape, the flax fiber 14 is fed using a pair of feed rollers 1 and 2 into the working chamber located inside the casing 7, where it is exposed from the working edges of the beating strips 11. When striking with beating strips (Fig. 3) along the tape in the elements fibers inertial forces arise, contributing to the separation of non-fibrous impurities. The beater bar located in plane A deflects the belt in the direction of its movement. The beating bar, located in plane B, moves towards and deflects the ends of the fibers in the opposite direction, which increases the girth angle and the friction force between the edges and the fiber. With further movement of the ball strap located in plane B, the ends of the fibers, rotating around the edge of the bead strap, overwhelm it, deviating in this direction from the center of rotation of the drums.

When summing up the next pair of beating strips, the directions of the applied strikes are reversed, which contributes to a more efficient loosening of the fiber. As a result of multiple impacts, the interfiber bonds are weakened, which leads to the splitting of the bundles of elementary fibers into separate bundles. At the same time, non-cellulosic impurities and bonfires are separated from the fiber. When the length of the free ends of individual complexes of a certain length is reached, individual fibers are pulled out of them under the influence of inertial forces and friction forces between the fibers and the edges of the beams. In the process of processing due to the fact that for each beat (Fig. 4), the section (S ₁ ) that is farthest from the axis of rotation of the drum is rotated relative to another section located in the bead embedment area (S ₂ ), the planes of these sections being parallel and turning the most distant section is made clockwise, when viewed from the axis of rotation of the drum, bundles of fibers separated from the tape from sections located at different distances from the axis of rotation of the drums will have the same length. Separated fibers, bonfires and dust are transported by a stream of air and removed from the treatment area. At the same time, the air flow will flow at high speed near the surface of the feed rollers, providing the necessary and timely location of the fibers in relation to the plane of the beat, as well as better cleaning of the fibers from adhering fibers and litter.

Using the proposed device will allow for more efficient stapling of flax fiber with minimal loss of spun fibers due to the alignment of the fibers along their length and more intensive entry into the air dispersion zone.

Claims (1)

A device for stapling flax fiber in a tape, containing feed rollers for feeding fiber into the working chamber in the form of a casing with an opening on the side surface for the output of the stapled fiber and scraper drums with radial beater strips, which are on the drums, rotating on the shafts simultaneously inside the casing, rotating on the shafts are installed alternately in two planes perpendicular to the axes of rotation, characterized in that for each beat the section farthest from the axis of rotation of the drum is rotated about in relative other section being in sealing beating zone, wherein the plane parallel to these cross sections, and the rotation of the outermost section carried in a clockwise direction when viewed from the drum rotation axis.

Images